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-rw-r--r--test/fixedbugs/issue52127.go62
1 files changed, 62 insertions, 0 deletions
diff --git a/test/fixedbugs/issue52127.go b/test/fixedbugs/issue52127.go
new file mode 100644
index 0000000..7738c3f
--- /dev/null
+++ b/test/fixedbugs/issue52127.go
@@ -0,0 +1,62 @@
+// run
+//go:build !js
+// +build !js
+
+// Copyright 2022 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+// Issue 52127: Too many syntax errors in many files can
+// cause deadlocks instead of displaying error messages
+// correctly.
+
+package main
+
+import (
+ "bytes"
+ "fmt"
+ "os"
+ "os/exec"
+ "path/filepath"
+)
+
+func main() {
+ dir, err := os.MkdirTemp("", "issue52127")
+ if err != nil {
+ panic(err)
+ }
+ defer os.RemoveAll(dir)
+
+ args := []string{"go", "build"}
+ write := func(prefix string, i int, data string) {
+ filename := filepath.Join(dir, fmt.Sprintf("%s%d.go", prefix, i))
+ if err := os.WriteFile(filename, []byte(data), 0o644); err != nil {
+ panic(err)
+ }
+ args = append(args, filename)
+ }
+
+ for i := 0; i < 100; i++ {
+ write("a", i, `package p
+`)
+ }
+ for i := 0; i < 100; i++ {
+ write("b", i, `package p
+var
+var
+var
+var
+var
+`)
+ }
+
+ cmd := exec.Command(args[0], args[1:]...)
+ output, err := cmd.CombinedOutput()
+ if err == nil {
+ panic("compile succeeded unexpectedly")
+ }
+ if !bytes.Contains(output, []byte("syntax error:")) {
+ panic(fmt.Sprintf(`missing "syntax error" in compiler output; got:
+%s`, output))
+ }
+} \ No newline at end of file